Mercurial > eldonilo > lightstring

annotate lightstring.js @ 62:b1e75cdbb0ad

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Don’t allow more than one iq handler to respond, and respond with an service-unavailable when not handled.
author Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
date Wed, 01 Feb 2012 18:37:57 +0100
parents 0e86fca6a596
children 20da4fb67977
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1 'use strict';
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2
2
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3 /**
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4 Copyright (c) 2011, Sonny Piers <sonny at fastmail dot net>
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5
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6 Permission to use, copy, modify, and/or distribute this software for any
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7 purpose with or without fee is hereby granted, provided that the above
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8 copyright notice and this permission notice appear in all copies.
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9
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10 THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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11 WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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12 MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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13 ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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14 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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15 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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16 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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17 */
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18
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19
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20 /**
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21 * @namespace No code from lightstring should be callable outside this namespace/scope.
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22 */
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23 var Lightstring = {
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24 /**
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25 * @namespace Holds XMPP namespaces.
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26 * @description http://xmpp.org/xmpp-protocols/protocol-namespaces
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27 */
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28 ns: {
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29 streams: 'http://etherx.jabber.org/streams',
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30 jabber_client: 'jabber:client'
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31 },
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32 /**
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33 * @namespace Holds XMPP stanza builders.
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34 */
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35 stanzas: {
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36 stream: {
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37 open: function(aService) {
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38 //FIXME no ending "/" - node-xmpp-bosh bug
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39 return "<stream:stream to='" + aService + "'" +
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40 " xmlns='" + Lightstring.ns['jabber_client'] + "'" +
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41 " xmlns:stream='" + Lightstring.ns['streams'] + "'" +
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42 " version='1.0'/>";
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43 },
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44 close: function() {
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45 return "</stream:stream>";
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46 }
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47 },
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48 errors: {
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49 iq: function(type, error) {
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50 return "<iq to='" + stanza.DOM.getAttributeNS(null, 'from') + "'" +
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51 " id='" + stanza.DOM.getAttributeNS(null, 'id') + "'" +
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52 " type='error'>" +
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53 "<error type='" + type + "'>" +
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54 "<" + error + " xmlns='" + Lightstring.namespaces['xmpp_stanzas'] + "'/>" + //TODO: allow text content.
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55 //TODO: allow text and payload.
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56 "</error>" +
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57 "</iq>";
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58 }
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59 }
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60 },
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61 plugins: {},
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62 /**
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63 * @private
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64 */
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65 parser: new DOMParser(),
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66 /**
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67 * @private
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68 */
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69 serializer: new XMLSerializer(),
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70 /**
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71 * @function Transforms a XML string to a DOM object.
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72 * @param {String} aString XML string.
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73 * @return {Object} Domified XML.
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74 */
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75 XML2DOM: function(aString) {
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76 var DOM = null;
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77 try {
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78 DOM = this.parser.parseFromString(aString, 'text/xml').documentElement;
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79 }
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80 catch (e) {
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81 alert(e);
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82 }
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83 finally {
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84 return DOM;
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85 };
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86 },
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87 /**
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88 * @function Transforms a DOM object to a XML string.
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89 * @param {Object} aString DOM object.
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90 * @return {String} Stringified DOM.
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91 */
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92 DOM2XML: function(aElement) {
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93 var XML = null;
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94 try {
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95 XML = this.serializer.serializeToString(aElement);
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96 }
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97 catch (e) {
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98 //TODO throw error
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99 }
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100 finally {
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101 return XML;
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102 };
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103 },
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104 /**
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105 * @function Get an unique identifier.
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106 * @param {String} [aString] Prefix to put before the identifier.
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107 * @return {String} Identifier.
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108 */
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109 newId: (function() {
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110 var id = 1024;
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111 return function(prefix) {
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112 if (typeof prefix === 'string')
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113 return prefix + id++;
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114 return '' + id++;
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115 };
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116 })()
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117 };
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118
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119 /**
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120 * @constructor Creates a new Lightstring connection
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121 * @param {String} [aService] The Websocket service URL.
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122 * @memberOf Lightstring
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123 */
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124 Lightstring.Connection = function(aService) {
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125 if (aService)
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126 this.service = aService;
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127 this.handlers = {};
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128 this.callbacks = {};
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129 this.on('stream:features', function(stanza) {
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130 var nodes = stanza.DOM.querySelectorAll('mechanism');
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131 //SASL/Auth features
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132 if (nodes.length > 0) {
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133 this.emit('mechanisms', stanza);
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134 var mechanisms = {};
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135 for (var i = 0; i < nodes.length; i++)
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136 mechanisms[nodes[i].textContent] = true;
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137
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138
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139 //FIXME support SCRAM-SHA1 && allow specify method preferences
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140 if ('DIGEST-MD5' in mechanisms)
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141 this.send(
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142 "<auth xmlns='urn:ietf:params:xml:ns:xmpp-sasl'" +
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143 " mechanism='DIGEST-MD5'/>"
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144 );
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145 else if ('PLAIN' in mechanisms) {
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146 var token = btoa(
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147 this.jid +
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148 '\u0000' +
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149 this.jid.node +
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150 '\u0000' +
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151 this.password
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152 );
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153 this.send(
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154 "<auth xmlns='urn:ietf:params:xml:ns:xmpp-sasl'" +
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155 " mechanism='PLAIN'>" + token + "</auth>"
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156 );
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157 }
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158 }
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159 //XMPP features
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160 else {
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161 this.emit('features', stanza);
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162 var that = this;
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163 //Bind http://xmpp.org/rfcs/rfc3920.html#bind
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164 var bind =
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165 "<iq type='set' id='"+Lightstring.newId('sendiq:')+"' xmlns='jabber:client'>" +
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166 "<bind xmlns='urn:ietf:params:xml:ns:xmpp-bind'>" +
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167 (this.jid.resource? "<resource>" + this.jid.resource + "</resource>": "") +
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168 "</bind>" +
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169 "</iq>";
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170 this.send(
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171 bind,
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172 //Success
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173 function(stanza) {
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174 //Session http://xmpp.org/rfcs/rfc3921.html#session
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175 this.jid = new Lightstring.JID(stanza.DOM.textContent);
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176 that.send(
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177 "<iq type='set' id='"+Lightstring.newId('sendiq:')+"' xmlns='jabber:client'>" +
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178 "<session xmlns='urn:ietf:params:xml:ns:xmpp-session'/>" +
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179 "</iq>",
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180 function() {
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181 that.emit('connected');
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182 }
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183 );
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184 },
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185 //Error
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186 function(stanza) {
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187 //TODO: Error?
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188 }
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189 );
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190 }
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191 });
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192 this.on('success', function(stanza) {
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193 this.send(
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194 "<stream:stream to='" + this.jid.domain + "'" +
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195 " xmlns='jabber:client'" +
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196 " xmlns:stream='http://etherx.jabber.org/streams'" +
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197 " version='1.0'/>"
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198 );
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199 });
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200 this.on('failure', function(stanza) {
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201 this.emit('conn-error', stanza.DOM.firstChild.tagName);
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202 });
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203 this.on('challenge', function(stanza) {
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204 //FIXME this is mostly Strophe code
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205
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206 function _quote(str) {
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207 return '"' + str.replace(/\\/g, '\\\\').replace(/"/g, '\\"') + '"';
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208 };
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209
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210 var challenge = atob(stanza.DOM.textContent);
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211
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212 var attribMatch = /([a-z]+)=("[^"]+"|[^,"]+)(?:,|$)/;
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213
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214 var cnonce = MD5.hexdigest(Math.random() * 1234567890);
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215 var realm = '';
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216 var host = null;
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217 var nonce = '';
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218 var qop = '';
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219 var matches;
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220
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221 while (challenge.match(attribMatch)) {
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222 matches = challenge.match(attribMatch);
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223 challenge = challenge.replace(matches[0], '');
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224 matches[2] = matches[2].replace(/^"(.+)"$/, '$1');
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225 switch (matches[1]) {
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226 case 'realm':
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227 realm = matches[2];
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228 break;
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229 case 'nonce':
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230 nonce = matches[2];
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231 break;
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232 case 'qop':
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233 qop = matches[2];
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234 break;
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235 case 'host':
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236 host = matches[2];
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237 break;
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238 }
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239 }
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240
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241 var digest_uri = 'xmpp/' + this.jid.domain;
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242 if (host !== null)
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243 digest_uri = digest_uri + '/' + host;
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244 var A1 = MD5.hash(this.jid.node +
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245 ':' + realm + ':' + this.password) +
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246 ':' + nonce + ':' + cnonce;
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247 var A2 = 'AUTHENTICATE:' + digest_uri;
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248
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249 var responseText = '';
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250 responseText += 'username=' + _quote(this.jid.node) + ',';
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251 responseText += 'realm=' + _quote(realm) + ',';
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252 responseText += 'nonce=' + _quote(nonce) + ',';
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253 responseText += 'cnonce=' + _quote(cnonce) + ',';
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254 responseText += 'nc="00000001",';
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255 responseText += 'qop="auth",';
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256 responseText += 'digest-uri=' + _quote(digest_uri) + ',';
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257 responseText += 'response=' + _quote(
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258 MD5.hexdigest(MD5.hexdigest(A1) + ':' +
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259 nonce + ':00000001:' +
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260 cnonce + ':auth:' +
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261 MD5.hexdigest(A2))) + ',';
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262 responseText += 'charset="utf-8"';
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263 this.send(
21
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264 "<response xmlns='urn:ietf:params:xml:ns:xmpp-sasl'>" +
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265 btoa(responseText) +
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266 "</response>");
1
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267 });
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268 };
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269 Lightstring.Connection.prototype = {
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270 /**
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271 * @function Create and open a websocket then go though the XMPP authentification process.
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272 * @param {String} [aJid] The JID (Jabber id) to use.
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273 * @param {String} [aPassword] The associated password.
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274 */
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275 connect: function(aJid, aPassword) {
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276 this.emit('connecting');
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277 this.jid = new Lightstring.JID(aJid);
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278 if (aPassword)
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279 this.password = aPassword;
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280
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281 if (!this.jid.bare)
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282 throw 'Lightstring: Connection.jid is undefined.';
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283 if (!this.password)
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284 throw 'Lightstring: Connection.password is undefined.';
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285 if (!this.service)
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286 throw 'Lightstring: Connection.service is undefined.';
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287
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288 if(typeof(WebSocket) === "function") {
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289 this.socket = new WebSocket(this.service, 'xmpp');
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290 }
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291 else if(typeof(MozWebSocket) === "function") {
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292 this.socket = new MozWebSocket(this.service, 'xmpp');
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293 }
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294 else {
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295 throw new Error('WebSocket not available.');
17
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296 }
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297
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298 var that = this;
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299 this.socket.addEventListener('open', function() {
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300 //TODO: if (this.protocol !== 'xmpp')
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301
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302 var stream = Lightstring.stanzas.stream.open(that.jid.domain);
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303 //TODO: Use Lightstring.Connection.send (problem with parsing steam);
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304 that.socket.send(stream);
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305 var stanza = {
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306 XML: stream
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307 };
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308 that.emit('output', stanza);
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309 });
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310 this.socket.addEventListener('error', function(e) {
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311 that.emit('error', e.data);
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312 console.log(e.data);
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313 });
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314 this.socket.addEventListener('close', function(e) {
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315 that.emit('disconnected', e.data);
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316 });
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317 this.socket.addEventListener('message', function(e) {
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318 var stanza = new Lightstring.Stanza(e.data);
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319
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320 //TODO node-xmpp-bosh sends a self-closing stream:stream tag; it is wrong!
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321 that.emit('input', stanza);
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322
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323 if(!stanza.DOM)
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324 return;
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325
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326 that.emit(stanza.DOM.tagName, stanza);
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327
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328 if (stanza.DOM.tagName === 'iq') {
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329 var payload = stanza.DOM.firstChild;
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330 if (payload)
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331 that.emit('iq/' + payload.namespaceURI + ':' + payload.localName, stanza);
43
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332
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333 var id = stanza.DOM.getAttributeNS(null, 'id');
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334 if (!(id && id in that.callbacks))
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335 return;
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336
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337 var type = stanza.DOM.getAttributeNS(null, 'type');
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338 if (type !== 'result' && type !== 'error')
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339 return; //TODO: emit an warning, perhaps.
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340
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341 var callback = that.callbacks[id];
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342 if (type === 'result' && callback.success)
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343 callback.success(stanza);
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344 else if (type === 'error' && callback.error)
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345 callback.error(stanza);
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346
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347 delete that.callbacks[id];
41
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348
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349 //TODO: really needed?
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350 } else if (stanza.DOM.tagName === 'message') {
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351 var payloads = stanza.DOM.children;
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352 for (var i = 0; i < payloads.length; i++)
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353 that.emit('message/' + payloads[i].namespaceURI + ':' + payloads[i].localName, stanza);
23
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354 }
17
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355 });
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356 },
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357 /**
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358 * @function Send a message.
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359 * @param {String|Object} aStanza The message to send.
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360 * @param {Function} [aCallback] Executed on answer. (stanza must be iq)
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361 */
59
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362 send: function(aStanza, aSuccess, aError) {
29
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diff changeset
363 if (!(aStanza instanceof Lightstring.Stanza))
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diff changeset
364 var stanza = new Lightstring.Stanza(aStanza);
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365 else
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366 var stanza = aStanza;
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diff changeset
367
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parents: 28
diff changeset
368 if(!stanza)
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diff changeset
369 return;
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diff changeset
370
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parents: 28
diff changeset
371 if (stanza.DOM.tagName === 'iq') {
42
ee874d064650 Check iq sending.
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parents: 41
diff changeset
372 var type = stanza.DOM.getAttributeNS(null, 'type');
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parents: 41
diff changeset
373 if (type !== 'get' || type !== 'set')
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374 ; //TODO: emit an error.
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parents: 41
diff changeset
375
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diff changeset
376 var callback = {success: aSuccess, error: aError};
43
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parents: 42
diff changeset
377
42
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parents: 41
diff changeset
378 var id = stanza.DOM.getAttributeNS(null, 'id');
43
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diff changeset
379 if (!id)
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parents: 42
diff changeset
380 ; //TODO: emit an warning.
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diff changeset
381 else
59
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diff changeset
382 this.callbacks[id] = callback;
43
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diff changeset
383
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diff changeset
384 } else if (aSuccess || aError)
42
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diff changeset
385 ; //TODO: callback can’t be called with non-iq stanza.
17
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parents: 16
diff changeset
386
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parents: 16
diff changeset
387
29
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parents: 28
diff changeset
388 //TODO this.socket.send(stanza.XML); (need some work on Lightstring.Stanza)
37
6773e5bc2ca0 several fixes
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diff changeset
389 var fixme = Lightstring.DOM2XML(stanza.DOM);
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diff changeset
390 stanza.XML = fixme;
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diff changeset
391 this.socket.send(fixme);
29
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diff changeset
392 this.emit('output', stanza);
17
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diff changeset
393 },
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parents: 16
diff changeset
394 /**
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395 * @function Closes the XMPP stream and the socket.
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parents: 16
diff changeset
396 */
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parents: 16
diff changeset
397 disconnect: function() {
18
48bc65a0e0f1 add pubsub config
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parents: 17
diff changeset
398 this.emit('disconnecting');
44
3dfb596cf669 Add a plugin loader.
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parents: 43
diff changeset
399 var stream = Lightstring.stanzas.stream.close();
18
48bc65a0e0f1 add pubsub config
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parents: 17
diff changeset
400 this.send(stream);
17
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parents: 16
diff changeset
401 this.emit('XMLOutput', stream);
18
48bc65a0e0f1 add pubsub config
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parents: 17
diff changeset
402 this.socket.close();
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403 },
44
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404 load: function() {
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405 for (var i = 0; i < arguments.length; i++) {
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406 var name = arguments[i];
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407 if (!(name in Lightstring.plugins))
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408 continue; //TODO: throw an error?
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409
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410 var plugin = Lightstring.plugins[name];
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411
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412 //Namespaces
44
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413 for (var ns in plugin.namespaces)
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414 Lightstring.ns[ns] = plugin.namespaces[ns];
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415
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416 //Stanzas
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417 Lightstring.stanzas[name] = {};
44
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418 for (var stanza in plugin.stanzas)
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419 Lightstring.stanzas[name][stanza] = plugin.stanzas[stanza];
44
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420
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421 //Handlers
44
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422 for (var handler in plugin.handlers)
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423 this.on(handler, plugin.handlers[handler]);
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424
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425 //Methods
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426 this[name] = {};
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427 for (var method in plugins.methods)
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428 this[name][method].bind(this);
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429
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430 if (plugin.init)
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431 plugin.init();
44
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432 }
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433 },
17
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434 /**
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435 * @function Emits an event.
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436 * @param {String} aName The event name.
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437 * @param {Function|Array|Object} [aData] Data about the event.
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438 */
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439 emit: function(aName, aData) {
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440 var handlers = this.handlers[aName];
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441 if (!handlers)
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442 return;
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443
62
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444 if (aData.localName !== 'iq') {
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445 for (var i = 0; i < handlers.length; i++)
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446 handlers[i].call(this, aData);
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447
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448 return;
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449 }
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450
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451 var ret;
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452 for (var i = 0; i < handlers.length; i++) {
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453 ret = handlers[i].call(this, aData);
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454 if (typeof ret !== 'boolean')
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455 return; //TODO: emit a big error!
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456
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457 if (ret)
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458 return;
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459 }
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460
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461 conn.send(Lightstring.stanzas.errors.iq('cancel', 'service-unavailable'));
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462 },
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463 /**
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464 * @function Register an event handler.
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465 * @param {String} aName The event name.
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466 * @param {Function} aCallback The callback to call when the event is emitted.
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467 */
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468 on: function(aName, callback) {
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469 if (!this.handlers[aName])
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470 this.handlers[aName] = [];
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471 this.handlers[aName].push(callback);
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472 }
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473 };